Vibratory unit



Nov. 19, 1929. w, D, PACK 1,735,874

VIBRATORY UNIT Filed Sept. 30, 1927 z 2112M 4Q f 'MTTORNEYS Patented. Nov. 19, 1 929 v UNITED STATES PATENT OFFICE WEHRLI 1). PACK, OF SALT LAKE CITY, UTAH, ASSIGN'OR T UTAH RADIO PRODUCTS COMPANY, INCORPORATED,

A CORPORATION OF UTAH VIBRATOBY UNIT Application filed September 30, 1927. Serial No. 223,230.

My invention relates particularly to vibratory units of the type used in receivers for transmission of sound vibrations such as are utilized in telephonic communication, and

more especially to that class of receivers used of the armature are practical for reproducing musical vibrations.

One of the objects of my invention is to produce a vibratory unit in which the two poles are brought into close proximity with one another and so arranged to allow two coils to be mounted-"betweenthem; the varying magnetic action between said poles causing an armature to vibrate; which, when connected to a diaphragm will produce sound consequent to the variation of current in said coils mounted between the poles.

' Another object of my invention is to produce a vibratory unit having means which will prevent distortion of the sound produced. v

A further objectof my invention is to produce a vibratory unit for a receiver which consists primarily of a novel way of transmitting the movement of the armature to diaphragm or any other member that is to be vibrated said armature being vibrated at right angles to the plane of vibration of said diaphragm or other member to be vibrated.

A further object of my invention is to produce a vibratory unit in which the ends left free with equal spacing between the poles of the magnet and the transmission of energy is made from'its middle portion so that a perfect balance of the armature can be obtained.

, 'With these and other objects in View, to be more fully set forth hereinafter, the invention consists in the novel construction,

ation and construction herein described in the following specificationand illustrated in the accompanying drawings. p

The disclosure made the basis of exemplifying the present inventive concept suggests a embodiment thereof, but the invention is not .to be restricted to the exact details of this disclosure, and the latter, therefore, is to be understood from an illustrative, rather than a restrictive standpoint.

The invention will first be describedin connection with the drawings, wherein similar reference characters are used 'to designate corresponding parts throughout the several views, and more specifically defined and indicated in the appended claims.

' Attention is which i Fig. 1 is a plan view of my improved vibratory unit;

Fig. 2 IS a central sectional view looking in the direction of the arrows 22 of Figure 1;

Fig. 3 is a cross sectional view taken on the center in the direction of the arrows 3-3 ofFig-- ure 1;

Fig. 4 is a plan view of the mounting block for the coils and armature;

Fig. 5 is a perspective view of the armature assembly; and,

Fig. 6 is a front elevation of the armature assembly partly in section and looking in the direction. of the arrows 66 of Figure 5, illustrating how the projecting member of the armature mounting to which the energy of the armature vibrations is imparted, is corrugated to obtain stiffness.

Numeral 1 represents a soft iron armature to which is fastened the armature mounting 2, preferably made of spring tempered phosphorbronze and having the corrugated projecting member 2 integral therewith. Said armature mountingQ, is secured to the armature by electrical welding, hard soldering, or any other suitable means to accomplish the desired results. The projecting member 2 is corrugated to give it stidness so that the energy imparted upon it by the armature will not distort it, which in turn would cause distortion of the sound produced by a diaphragm or other member to be vibrated through the medium of the connecting link 2. The magnetic coils 3-3 consist of fine Wire wound upon spools, through the center of whichthe armature 2 passes. The pole pieces ll and 5-5 (Figures 1, 2 and 3) are fastened to the permanent magnet12 by means of the bolts 10 and the nuts 11, and are so shaped to have inwardly projecting fingers between which line of the armature and looking.

directed to the drawings in the endsof the armature are evenly spaced; The electrical impulses given the coils through their lead wire 3 superpose their magnetic forces upon the armature l and the pole pieces 4:4 and 5+5 connected to the permanent magnet 12 and due to the superposi tion of these forces the ends of the armature 1 are attracted or repulsed between the inwardly projecting fingers of the pole pieces causing it to vibrate. The vibration of the armature causes the armature mounting to flex at its center portion due to its being securely fastened at its ends to the mounting block 6 of non-magnetic material by means of the screws 7, which pass through the holes 17 provided therefor in said ends of the armature mounting and screw into the threaded holes '18 in the bottom of the recess 15 as illustrated most clearly in Figures 3 and 4. The coils 33 are evenly spaced on both sides of the armature mounting by means of the spacing pins 14: and 14- of the mounting block and they are centralized around the armature by means of the circular portion 13 as illustrated in Figures 1, 2 and 4. The mounting block is securely held in position by the bolts 8 and the nuts 9, the bolts passing through suitable holes in the pole pieces and the holes 16 in said block. The bolts 8 also prevent the pole pieces from being turned from their normal positions and the inwardly projecting fingers of the pole pieces prevent the coils from outward movement by clamping them down tightly against the pins 14 and 14k. j

In accordance with the provisions of the patent statute, I have described my invention but I desire it understood that it is not confined to the particular form shown and described, the same being merely illustrative, and that the invention can be carried out in other ways Without departing from the spirit of my invention, and therefore, I claim broadly the right to employ all equivalent instrumentalities coming Within the scope-of the appended claims, and by means of which, objects of my invention are attained and new results accomplished; as it is obvious that the particular embodiments herein shown and described are only some of many that can be employed to attain these objects and accomplished these results.

Having now described my invention, what I claim and desire to secure by Letters Patent, 1s

1. In a Vibratory unit of the character described, the combination of a permanent magnet having pole pieces securely fastened thereto and extending inward, a mounting block securely fastened between the poles of said magnet and said pole pieces, a pair of coils mounted in said mounting block, and an armature assembly also securely fastened to said block consisting of an armature, a flexible mounting and a portion extending from the center of the armature mounting at right angles to said armature to which the energy of the armature vibrations is imparted.

2. In a vibratory unit of the character described, the combination'of a permanent n1agnet having pole pieces securely fastened thereto, said pole pieces being provided with projecting members, a mounting block securely fastened between the poles of said magnet and said pole pieces, a pairof coils mounted in said mounting block, and an armature assembly also securely fastened to said block consisting of an armature, a flexiblemounting and a portion extending from the center of the armature mounting at right angles to said armature to which the energy of the armature vibrations is imparted.

3. A vibratory unit having a permanent magnet, two pole pieces secured thereto, said pole pieces being provided with inwardly projecting fingers, and an armature in which the ends thereof are free with equal spacing between the poles of the magnet and means for the transmission of energy extending from the middle portion of the armature so that a perfect balance of the armature is obtained.

4. A vibratory unit having a magnet, pole pieces aflixed at the end of said magnet, and an armature in which the ends thereof are free with equal spacing between the poles of the magnet and means for the transmission of energy extending from the middle portion of the armature so that a perfect balance of the armature is obtained.

5. A vibratory unit having a magnet, pole pieces secured thereto, said pole pieces being provided with inwardly projecting fingers and an armature in which the ends thereof are free with equal spacing between the polesof the magnet and. means for the transmission of energy extending from the middle portion so that a perfect balance of the armature is obtained.

This specification signed this 27th day of September, 1927.

WEHRLI D. PACK. 

